On the S series switches of all versions:

• When you log in a a switch through a console port, no default user name or password is provided. The system asks you to set the user name and password when you log in to the switch for the first time.
• Before you log in to a switch through Telnet, create a Telnet account.

• When you log in to a switch through web, your default user level is 0: visit level.
   

For other default passwords, see Table 1

    NOTE:
By default, the console login password, BootROM password, and Telnet password are case-sensitive.

Table 1 Default passwords used by S series switches